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10mM boric acid or 10mM sodium borate. The 10mM sodium borate solution because sodium borate is a weak base. The 10mM acetic acid solution because

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10mM boric acid or 10mM sodium borate. The 10mM sodium borate solution because sodium borate is a weak base. The 10mM acetic acid solution because boric acid is a weak acid. Solutions containing only 10mM boric acid or sodium borate cannot serve as buffer The 10mM boric acid and sodium borate solutions have equal buffering capacity

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